Process of manufacturing proofed paper tubes.



J. R. HARBECK. PROCESS 0F MANUFACTURING PROOFED PAPER TUBES.

APPLICATION FILED JAN. 23, 19H. ll?3,66 1

Patented Feb. 29, 1916.r

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I. R. HARBECK. PROCESS 0F MANUFACTURING PROOFED PAPER TUBES.

APPLICATION FILED .IAN.231I9II.

' Patented Feb. 29, 1916.

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JERVIS R. HARBECK, OF DETROIT, MICHIGAN, ASSIG-NOR TO DETROIT CAN COMPANY, OF DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

PROCESS OF MANUFACTURING PROOFED PAPER TUBES.

Application iled January 23, 1911.

To all whom it may concern.

Be it known that I, JnRvIs R. HARBEGK, a citizen of the United States, residing in Detroit, in the county vof Wayne and State of Michigan, have invented a new and useful Improvement in Processes of Manufacturing Proofed Paper Tubes, of which the following is a specification.

My invention relates to improvements 1n the manufacture o f proofed paper tubes or bodies for cans.

I-Ieretofore in the manufacture of waterproofed paper tubes or bodies, those designed to be impervious to passage of liquid or gases, it has been customary to apply or introduce the asphaltum or waterproofing compound in a heated and liquid condition between successive layers or coils of the paper body, or else to introduce it in a dry and powdered form between successive layers, and` then subject the paper body to heat to fuse the asphaltum or waterproofing compound. Both these methods are more or less objectionable, and slow, expensive and uncertain in operation, and both require a relatively large amount of asphaltum or proofing compound to be used, as it is applied directly to the porous and relatively coarse and thick paper or fibrous material of which the body or tube is made, and both require special machines or appliances, the former being liableto gum upand interfere with the operation of the body making or tube winding machine and the latter requiring a special heating and fusing step which may be more or less uncertain or defective in rendering the paper or fibrous body completely impervious to passage of liquids or gases.

The object of my invention is to provide an improved method or process of manufacturing waterproofed or liquid and gas proofed paper or fibrous can bodies or tubes, by use of which the difficulties heretofore experienced may be overcome, the waterproofed bodies or tubes manufactured very rapidly and cheaply and rendered thoroughly impervious to passage of liquids or gases, and with a relatively small amount of asphaltum or proofing material, and without the necessity of special machines or appliances. The method or process I employ to practically accomplish this object or result, and this constitutes my invention, consists in introducing between the successive coils or layers of the paper 0r other Specification of Letters Patent.

Patented Feb.. 29, 1916..

serial no. 604,144.

fibrous material of which the body or tube 1s formed, an extremely thin, dry, solid, flexible, continuous film of asphaltum o1 proofing compound supported and embraced between two layers of thin, close paper which are rmly united thereto and secured together thereby, the thin paper exterior coating of the asphaltum or proong film adapting it to be glued or adhesively united on both faces thereof tothe coils or layers of tube-material with which it contacts, both the tube-material webs and the composite proofing material web being spirally wound, the proofing material web forming one thickness or layer, and the tubematerial web or webs forming as many inner or outer thicknesses or layers, as may be desired. i

In practising my invention, the paper or tube-material webs are wound spirally around a forming mandrel, and the proong member web is also wound spirally, one of its faces being coated with adhesive material to adhesively unite it to the inner layer o-f tube-material web upon which it is wound, and the superposed web of tube-material having one of its faces coated with adhesive so that the proofing member web or layer is adhesively united on both its faces to the layers of tube-material between which it is interposed.

Any suitable spiral tube winding machine known to those skilled in the art may be used in practising my invention.

In the accompanying drawing forming a part of this specification, to enable my invention to be more fully understood and readily practised by those skilled in the art, I have shown at Figure l a longitudinal section of a proofed, laminated paper body or tube as produced by my process. Fig. 2 is a cross section on line 2-2 of Fig. 1. Fig. 3 is a plan view, showing a' short piece of the proofed paper tube and the tube-material v is composed preferably of a spirally wound inner layer 3 formed from the tube-material web 4, an intermediate spirally wound proofing member layer 5 formed from the proofing member web 6 and an outer spirally wound layer 7 formed from the tube-material web 8. The proofing member layer 5 and the web 6 from which it is formed is composed of a solid flexible film of asphaltum or proofing compound 9 embraced and compressed between and rigidly secured to thin supporting paper or fibrous layers 10, 11 on the opposite faces of the proong compound film. The thin paper or fibrous layers 10, 1l of the proofing compound film 9 adapt the proofing member web to be adhesively united to the tube-material layers 3, 7, between which it is interposed by the adhesive coatv ing applied to one face of the tube-material web 4, and also to one face of the proofing member web 6.

In Fig. 4 of the drawing, 12 represents the mandrel or former around which the spirally wound proofed paper tube is formed and 13, 14 the diagonally arranged feed belts which serve to rotate and feed or advance the spirally wound paper tube as it is formed from the webs of tube-material 4, 8, and the intermediate proofing member 6 which are fed to the'mandrel at an angle by their guide and feed devices 15, 16, 17, one for each web.

In the drawing, the relative thickness of the tube-material layers and proofing member layer is exaggerated for vgreater c1earness of illustration, and this applies'specially to the proofing film and the fibrous layersl united thereto, all of which in practice are extremely thin.

l. The herein described process for making paper container bodies, which consists in applying to a layer of thin porous paper a thin film of fused cement to form. a thin compound proofing sheet adapted to be glued or adhesively united to a layer" of tube material, and then uniting such compound proong sheet adhesively and by a Winding process to a sheet of paper tube material, to form a proofed and impervious container body.

2. The herein described process for `making paper container bodies, which consists in uniting two layers of thin porous paper with a thin interposed film of a fused cement to form athin compound proofing sheet adapted to be glued or adhesively united to a layer of tube material, and then uniting such compound proofing sheet adhesively and by a winding process to a sheet of paper tube material, to form a proofed and impervious container body.

3. The herein described process for manufacturing wound and proofed paper container bodies, consisting of a plurality of successive coils, which consists in first pre- 'paring a proofing member or film by inclosing a thin flexible and continuous film of fused proofing compound between two layers of thin porous paper which are firmly united thereto and secured together thereby, the thin paper exterior coating of the proofing lm adapting it to be adhesively united on both faces thereof to the coils or layers of tube material with which it is to contact; and then introducing the said thin proofing member between successive layers or coils of paper tube material, and adhesively uniting the said proofing member to the layers of the tube material between which it is interposed.

JERVIS R. HARBECK.

Witnesses: I

W. ZI. CULLEN, D. C. S'NYDER. 

